在"so...that..." 或 "such...that..." 的句構中,若將so 或 that 及其所引導的詞類置於句首時,亦採倒裝句構.

例:

1. He is so helpful that we all like him.

= So helpful is he that we all like him.

2. He has done so well that he deserves our respect.

=So well has he done that he deserves our respect.

3. He came so late that he missed the train.

= So late did he come that he missed the train.